import java.nio.ByteBuffer;
import java.nio.CharBuffer;
public class Main {
public static void main(String[] argv) throws Exception {
ByteBuffer buf = ByteBuffer.allocate(100);
CharBuffer cbuf = buf.asCharBuffer();
cbuf.put("a string");
int start = 2; // start is relative to cbuf's current position
int end = 5;
CharSequence sub = cbuf.subSequence(start, end); // str
}
}